My JVC KS-AX4700 no longer works. When it is hooked up, very little power comes out (meaning subs barely hit, but some noise is heard).
I have it apart, and I would love to fix it myself. Can someone help me out as to what the common parts that go are? What should I look for? Is it OK to dissassemble the board from the casing? Is it possible that there is still electricity stored in it (it was "undone" more than a month ago)?
Any help would be appreciated. I am good at technical things, although I have very little electronics experience.
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If the Power/Protect LED is red, usually the speaker wiring has a short-circuit or the speaker total impedance is wrong for the system. The most common issue is a bare spot on a speaker wire that is coming in contact with part of the car or another bare wire. Sometimes, it just means that the system got too hot.
Before you look for a problem with the KS-AX4302 board, look at your wiring and replace any damaged wires.
Try to rest amp (turn off power) be sure subs are disconnected. Se if protection light comes on. If it does the amp needs to be serviced porbably a burnt component. If the protection light does not come on, connect one sub at a time to see if either one surges. Could also be that the gain is turned up too much.
Check the 12v wire running from the battery to the amplifier. Also the sony explode is a garbage subwoofer compared to the Alpine.. sony (they say 1200w max but its more like 100w to power the thing) Amp could be going. Is the amplifier hot when running. If there is a burnt smell comming from the amp, its the amplifier
It sounds like you have blown your Output amplifier MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) You will see some components with metal tabs, these are some of those along with some secondary stage pre driver transistors also screwed to the metal case (heat sink). Ok you will need some pieces of equipment. First you will need a schematic of the unit (never work without a schematic), second you will need a volt ohmeter (yes I am old) you might call it a multimeter. Now this is the bare minimum of equipment you need. first open ope the scematic and find the main voltage rails and test points, these will be important as you traces the source of your problem down. I want you to take measure ments of the test points and compare them to the measurements in the schematic, the places where the diffences are dramatic are the places the problem may be. remeber take these measurements and compare them to the schematic and then try to isolate the problem down to the components that are truly bad.
Also pick up a book on how to repair audio amplifiers. This is the best I can do over the internet, happy hunting my friend.